Table 2: Results of the immunoglobulin assays.

Total tear IgE Serum dog-specific IgE Serum dog-specific IgG
Sensitivity 87.5% 25.0% 50.0%
Specificity 38.7% 77.4% 100.0%
False-positive rate 61.3% 22.6% 0.0%
False-negative rate 12.5% 75.0% 50.0%
Positive predictive value 26.9% 22.2% 100.0%
Negative predictive value 92.3% 80.0% 88.6%
Positive likelihood ratio 1.4 1.1 - (∞)

Detection of IgE or IgG antibody and positive/negative results of the skin prick test for dog allergen in all subjects (N=39).